Concrete-sleeve pipe-coupling.



No. 760,564. l 4PMENEED MAY 24,1190;

- l N. EEOADEEY-JR CONCRETE SLEEVE yPIPE GOUPLING.

, APPLIOATIONLEILED Romy/,11903. No loDEL.

y l W/"TNESSES,1

N20. 750,564. I i Y PATENTED MAY 24, 1,904.

' N. RHOADES, Jn.

CONCRETE SLEEVE PIPE GOUPLING. APPLICATION FILED Nov. 17J 1903.

No Marmi.. f 2 SHEETS-gum v2.

.UNITED STATES.

Patented May 24, 19o-i.'y

PATENT OFFICE.`

NELSON RHoADEs, JRQ,OFL1TTLETON, COLORADO.

CoNoRETE-.SLEEVE PIPE-COUPLING..

SPECIFICATIONforming'part of Letters Patent No. 760,564, dated. May 24, 1904.

Application filed TOVember 17,1903.` Serial No. 181,515. (No model.)

To all whom it may concern:

Be it known that l, NELSON RHoADEs, J r. a citizen of the United States, residing at Littleton, Arapahoe county, State of Colorado, (whose post-oflice is 404 and 408 Tabor Building, Denver, Colorado,) have invented a new and useful Improvement in Concrete-Sleeve Pipe-Couplings; yand I do hereby declare the following to be a full, clear,l and eXact description thereof. i

My invention relates to the couplings used for connecting the ends of clay, earthen, or

.for thecarrying of water or other liquids under great pressure without leakage or danger of breakage. Heretofore such pipes have been made with an enlargement or bell on one end, into which the small end of a succeeding section of pipe was inserted and calked into place by packing the space between the pipe and the bell end with concrete or other similar substance. This method of constructing, owing to the difference in contraction and expansion of the pipe and bell, they being of diierent diameter and volume, results in a great many fire-cracks during the application` of great heat in the processes of vitrication. These fire-cracks occur at "the point of junction between the pipe proper and the bell and greatly weaken the pipe, not only at the point of union between sections, but also for some distance back into the pipe from the bell. Thus while the pipe itself away 'from the end has strengthcapab'le of resisting the pressure due to great heads this Weakness renders it impracticable for use under appreciable heads. The result of placing it'under head is to force out the packing, cause it to break at the Weak point, or, since the packing consists of concrete forced between two vitrilied surfaces to which it does not closely adtions render it impracticable to'employ these classes of pipe so constructed in any watersupply system where great resistance to pressu re or protection against leakage 1s requlslte.

1 .The object of my inventionV is toovercome the above objections by providing a sleevecoupling for pipes of this class, and thus ob- `viate the necessity of constructing a bell end `on the pipe; to make it possible to construct .pipe of equal diameter and kthickness at all points and of constant strength throughout; to construct the coupling of such a class that 4when in place and connected to the pipe the packing used will adhere to the coupling and cannot bepushed out by pressure from within,

a water-tight union of the pipes resulting, the

point of union being of. strength equal to that vlilled With concrete, 'with the result that the surface against the vitrified. pipe becomes glazed and impervious to the passage of water through it; to construct a coupling which will be equally durable and indestructible as the pipe and will not materially add to the cost of the former types; `to construct such a coupling as when used with these pipes will adapt them to use insystems where great pressure Will be applied.

With these ends in View my invention consists of a molded concrete sleeve the outside diameter of which is uniform at every point for any given size of pipe, but the inner diameter of which is least at the middle, at which point its diameter is such as to permit the pipe which it couples to enter easily.` -From this middle point where the ends of the pipe-sections meet toward the ends of the sleeve the inner diameter of the sleeve increases to allow room for packing to be used in effecting the connection until within a short ner diameter of the sleeve is reduced to prevent the packing when hardened from being distance of the end of the sleeve, when the in- IOO ypushed out by the pressure from within.

"attached to pipe.

To give great strength to the sleeve, a cylinder of expanded metal or some class oi' woven or welded wire of diameter less than the outer diameter of the sleeve, being entirely surrounded and covered by concrete, is inserted.

To enable others not skilled in the artto make and use my invention and to show how the above objects are accomplished vby this concrete-sleeve pipe-coupling, I will describe' the same more fully, referring for that purpose to the accompanying drawings, in which- Figure l is an elevation of the sleeve. Fig. 2 is a plan of the sleeve. Fig. 3 is a cross- 'section on line Y Y. Fig/4 is a longitudinal cross-section of the sleeve. Fig. 5 is a `perspective of the sleeve. Fig.-6 isa longitudinal cross-section of two sleeves in place Fig. 7 is a longitudinal lelevation of two sleeves in place attached to pipe'. Fig. 8 is a perspective of two sleeve. in place attached to pipe. v

Similar letters referto similar parts throughout the several views.

That part of the drawings lettered A is a sleeve constructed from cement concrete under great pressure, the shortest inner diameter being slightly greater than the greatest diameter oi' the pipe with which it is used. rlhe sleeve lis made by pouring liquid concrete into a mold and subjecting it to great pressure,after which the mold is removed and the sleeve permitted to dry.

That part of the drawings 'lettered B is a metal core constructed within and covered by the material of which the sleeve is composed and consisting of expanded or perforated metal of any variety or spirally-formed wire, welded, or woven wire.

That part of the drawings lettered C is the choke-ring oi' the sleeve, which prevents the calking of the sleeve-joint from being forced outward when acted upon by pressure from within.

rlhat part of the drawings lettered D is the calking material used for closing the space between the pipe and the sleeve and consists when introduced of liquid concrete, and it is introduced into the joint by gravity-pressure and by the application of mechanical pressure reduced in volume and moisture to a condition of natural repose in the form shown in Fig. 6.

That part of the drawings lettered Fi is a cord of jute packing used to center the joints within the sleeve.

l am not aware that prior to my invention molded concrete sleeves with metal cores have been invented or used with clay, earthen, or vitriied pipe.

What I claim as my invention, and desire to secure by Letters Patent, is-

As an article of manufacture a sleeve for connecting the ends of pipes, said sleeve being composed of concrete and having embedded therein an annular reinforcing-strip of open-work metal, the central and end portions of said sleeve being of a reduced internal diameter and forming between them annular recesses for the reception oi packing, substantially as described.

NELSON RHOADES, Jn.

Witnesses:

WILLIAM C. STERNE, HARRY NUTTING. 

